The Mercedes Sprinter is a robust cargo vehicle that can endure a lot of pressure. Despite it being as reliable as it is. Inevitably, over time, an owner will encounter a problem related to it.
One problem that intermittently pops up occurs within the wheel speed sensors. These sensors play a critical role in Sprinter’s braking technology.
The safety and performance systems safeguard the driver, passengers, and pedestrians around the vehicle. In this article, we will look at the Mercedes Sprinter wheel speed sensor problems and its solution.
Article Summary
- What is A Wheel Speed Sensor?
- Symptoms of Mercedes Sprinter Wheel Speed Sensor Problems
- Causes of Mercedes Sprinter Wheel Speed Sensor Problems
- Diagnosing and Fixing Wheel Speed Sensor Problems
- How To Prevent Mercedes Sprinter Wheel Speed Sensor Problems
- FAQs on Mercedes Sprinter Wheel Speed Sensor Problems
What is A Wheel Speed Sensor?
The control module receives information concerning each wheel’s rotational speed. Per the specification, an ABS sensor, also known as a wheel speed sensor, will be detecting ABS and Electronic Stability Program (ESP) data going to the control module.
ABS and ESP systems are designed to prevent the wheels from locking up when you apply the brakes. For this system to function, it needs to know the speed at which each wheel is rotating. This is where an ABS sensor comes into play.
More specifically, when any one of the Sprinter’s wheels moves faster or slower than the others, it can trigger an action to limit the potential loss of control, such as electronic stability control.
Symptoms of Mercedes Sprinter Wheel Speed Sensor Problems
Fault of a wheel speed sensor can cause several problems, such as:
1. Warning Light On the Dashboard
The ABS warning light is likely the most common sign that your car’s ABS has an issue.
2. ESP/BAS Warning Light
If there is a sensor problem, the Electronic Stability Program (ESP) and Brake Assist System (BAS) warning lights may also light up.
3. Inconsistent Speedometer Readings
Inconsistent speedometer readings can result of a faulty sensor is giving erratic readings. In some cases, with this fault, the speedometer might cease to work entirely.
4. Poor Braking for Starters
Your vehicle’s braking performance could decrease, particularly if the ABS is on the fritz.
5. Wheel Speed Signal Issues
Problems transmitting the wheel speed sensor signal to the ECU can limit the traction control’s power application and cause tire slip.
Causes of Mercedes Sprinter Wheel Speed Sensor Problems
Several factors can lead to wheel speed sensor issues, including:
Wear and Tear: Over time, sensors can wear down from heavy use and exposure to a harsh driving environment.
Debris and Dirt: The problem with debris and dirt can be attributed to dirt, debris, or metal shavings accumulating around the sensor.
Damaged Wiring: Damage or corrosion to the wiring connecting the sensor to the ABS control module can cause the sensor to malfunction.
Impact Damage: Hitting a pothole or curb can physically damage the sensor or its mounting.
Diagnosing and Fixing Wheel Speed Sensor Problems
If the OBD-II scanner reports a code associated with the wheel speed sensor on that wheel, we should start there.
However, an engine advantage encourages the diagnosis to move between wheels until the problem is found. Sometimes, it’s best to start on one wheel and go in one direction, and other times, it’s best to start randomly.
This is not a hard and fast rule, but it’s a general method that tends to work. The steps are:
Inspect and Clean: If the sensor or its mounting area is dirty, use a soft brush to lightly clean them. Switch on the camera and attempt to take a picture to see if this solves the problem.
Check Wiring: Check all the wiring and connectors for damage and corrosion. Repair or replace damaged parts.
Check Fuses: Check all the fuses, turn on all the accessories, and check the main fuse. Replace any blown fuses.
Replace Sensor: A defective sensor must be replaced first. This can be done independently from the main electrical systems.
How To Prevent Mercedes Sprinter Wheel Speed Sensor Problems
To minimize the risk of wheel speed sensor problems, consider the following preventive measures:
Periodic Inspection: Periodically check the sensors and their wiring for any damage and wear.
Keep Clear: Make sure that the area around the sensors is kept clear of dirt and debris.
Avoid Harsh Conditions: If your vehicle is approaching a body of deep water, such as a flood or shallow stream, let an experienced driver who knows the vehicle and its capabilities, along with local conditions, lead the way.
Don’t let anyone else go first. Even a small amount of water can float a car or force water into the engine, causing damage.
Similarly, don’t drive into mud or other harsh environmental conditions if you think they will damage your sensors.
FAQs on Mercedes Sprinter Wheel Speed Sensor Problems
What Are the Symptoms of A Faulty Wheel Speed Sensor in A Mercedes Sprinter?
Here are some common symptoms of a faulty wheel speed sensor in a Mercedes Sprinter: ABS, ESP, or BAS warning light on, speed reading erratic with the brake pedal depressed, less than optimum braking performance, ABS or traction control system inoperative, and ESP light remains on. If any of these symptoms are present, a full inspection is recommended, and a diagnosis may be required.
How Can I Diagnose A Wheel Speed Sensor Problem?
Most of the time, a wheel speed sensor fault can be diagnosed by a code read via an OBD-II scanner from the vehicle’s ‘onboard’ computer that tells you which sensor is bad. You can also peer at the sensor itself and its wiring, looking for damage, dirt, or corrosion.
Can I Drive My Sprinter with A Faulty Wheel Speed Sensor?
Technically, you can drive your Sprinter with a bad wheel speed sensor. But should you do so? Not if you care for those around you. Faulty wheel speed sensors will wreak havoc with your ABS (and ESP if your van is equipped with it), ultimately reducing your van’s ability to brake and steer properly. This is nothing short of a major hazard, particularly in emergencies, so take care of your bad sensor promptly.
What is the Replacement Cost for A Wheel Speed Sensor?
Depending on the model year and where you install the sensor, a Mercedes Sprinter costs around $100 to $300 per wheel speed sensor. Call a few auto mechanics or service centers for quotes.
What Can Cause A Wheel Speed Sensor To Fail?
There could be several reasons for a wheel speed sensor to stop working. This might happen due to normal wear and tear, dirt and grime that gathers around the sensor, damaged or corroded wiring, and sometimes due to physical damage from being hit while crossing a pothole or curb. Regular checks and maintenance can avoid these issues. This will increase the life of the sensors.
Conclusion
Mercedes Sprinter wheel speed sensor problems threaten your safety and performance. By recognizing the symptoms and causes, taking precautionary measures, and promptly repairing issues with the help of a professional mechanic, you can ensure your Mercedes Sprinter runs smoothly.
